how to know whether compound is paramagnetic or diamagnetic if the compound is formed of more than 2 atoms like H20, co2,No2 , So2 ,NH4 etc tell me the rule
If a molecule has odd number of valence electrons, it is paramagnetic whereas molecules having even number of valence electrons are diamagnetic. Example:
Molecule Number of valence electrons
H2O 2 + 6 = 8 It is diamagnetic
CO2 4 + 12= 16 It is diamagnetic
NO2 5 + 12 = 27 It is paramagnetic
SO2 6 + 12 =18 It is diamagnetic
Molecule Number of valence electrons
H2O 2 + 6 = 8 It is diamagnetic
CO2 4 + 12= 16 It is diamagnetic
NO2 5 + 12 = 27 It is paramagnetic
SO2 6 + 12 =18 It is diamagnetic